html,body,main{
	height:100%;
	width:100%;
	margin:0px;
	padding:0px;
}
main{
	display:grid;
	grid-template-columns:200px auto;
	grid-template-rows:50px auto;
	grid-template-areas:"header header"
						"nav article"		
}
header{
	grid-area:header;
	border:1px solid #ccc
}
nav{
	grid-area:nav;
	border:1px solid #ccc
}
article{
	grid-area:article;
	border:1px solid #ccc;
}
section{
	height:100%;
}
#leftMenu{
   padding:0px;
}
.leftMenuLi1{
    list-style: none;
    border:1px #ccc solid;
    margin:2px 10px 1px;
    padding-left:0.5rem;
    font:bold 1.2rem/1.8rem '宋体';
    height:2rem;
    background-image:-webkit-linear-gradient(top,#ccc,white);
}
#leftSubMenu{
    padding-left:0.8rem;
}
.leftMenuLi2{
    list-style:none;
    border:1px #ccc solid;
    cursor: pointer;
    margin-right:10px;
    margin-bottom:2px;
    padding-left:20px;
}
.leftMenuLi1_image{
    width:16px;
    height: 17px;
    float: right;
    margin-right:8px;
    margin-top:4px;
    background-repeat:no-repeat; 
    background-size:450px 450px;
    background-position:-72px -361px;
    cursor: pointer;
}
iframe{
	border:0px;
	width:100%;
	height:99%
}
ul a:link,ul a:hover,ul a:active,ul a:visited{
	text-decoration: none;
	color:black;
	cursor:pointer;
}